Instruction 9-7
Microsoft Excel Was Used on a Set $n = 46$

question 28

True/False

Instruction 9-7
Microsoft Excel was used on a set of data involving the number of parasites found in a random sample of 46 Blue Tiger butterflies captured in Kakadu National Park. A biologist wants to know if the mean number of parasites per butterfly is greater than 20. She will make her decision using a test with a level of significance of 0.10. The following information was extracted from the Microsoft Excel output for the sample of 46 butterflies:
$n = 46$ ; Arithmetic Mean $= 28.00$ ; Standard Deviation $= 25.92$ ; Standard Error $= 3.82$ ;
Null Hypothesis: $H _ { 0 } : \mu \leq 20.000 ; a = 0.10 ; \mathrm { df } = 45 ; T$ Test Statistic $= 2.09$ ;
One-Tailed Test Upper CriticalValue $= 1.3006 ; p$ value $= 0.021$ ; Decision $=$ Reject.
-Referring to Instruction 9-7,the biologist can conclude that there is sufficient evidence to show that the mean number of parasites per butterfly is greater than 20 with no more than a 1% probability of incorrectly rejecting the true null hypothesis.

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Definitions:

Long Run

A period of time in economics during which all factors of production and costs are variable, allowing full adjustment to changes.

Average-Total-Cost Curve

A graphical representation in economics that shows how the average total cost of production changes as the quantity of output is altered.

Marginal Cost

The elevation in costs incurred by the creation of an additional unit of a good or service.

Long-Run Equilibrium

A state in which all factors of production and economic inputs can be fully adjusted, and all market forces are balanced.